[AyunuS]

These bids by GIB do not match their descriptions very well.

http://tinyurl.com/7s7u3b6

East has at best a partial stop in spades? Wouldn't 2NT or maybe even 3NT after the double have been a better representation of its hand than 2S?
West has 5-6 points and 6+ clubs?

And if east should have thought west had 5-6 points, why wouldn't it try for 3NT? Don't tell me it's because it would contradict it having at best a partial stop in spades, and then it's partner didn't show a stop in spades, so it thought it couldn't stop spades? Or did it just know the system did not have an option for its partner to show fewer than 5 points with any bid, meaning it thought its partner really could have none? Can someone please explain it to me?